A beautiful socialite enters the lives of three bickering musicians and inspires them to write a series of hit love-songs.
| Actor | Role |
|---|---|
 Jung WooOh Geun-tae (20s) | Oh Geun-tae (20s) |
 Han Hyo-jooMin Ja-young (20s) | Min Ja-young (20s) |
 Kim Yun-seokOh Geun-tae (40s) | Oh Geun-tae (40s) |
 Kim Hee-aeMin Ja-young (40s) | Min Ja-young (40s) |
 Jin GooLee Jang-hee (20s) | Lee Jang-hee (20s) |
 Jang Hyun-sungLee Jang-hee (40s) | Lee Jang-hee (40s) |
 Kang Ha-neulYoon Hyung-joo | Yoon Hyung-joo |
 Jo Bok-raeSong Chang-sik | Song Chang-sik |
 Kwon Hae-hyoKim Choon-sik | Kim Choon-sik |
 Lee Ru-ahnRan | Ran |
 Lee Dae-yeonGeun-tae's Father | Geun-tae's Father |
 Ahn Jae-hongByung-chul | Byung-chul |
 Park So-damHigh School Girl | High School Girl |
 Ki Do-hunSe-hwan | Se-hwan |
 Lee Yong-yiGeun-tae's Aunt | Geun-tae's Aunt |
 Kim Jae-uckKang Myung-chan | Kang Myung-chan |
 Kim Mi-kyeongGeun-tae's Mother | Geun-tae's Mother |
 Jeong Soo-kyoPub Friend | Pub Friend |
 Lee Ji-hoonMC | MC |